Radiocommunication Antenna Waveguide Assembly Offset Control
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Solution Overview
Problem
Circular section waveguides in radiocommunication antennas introduce offsets in the plane of propagation of polarized electromagnetic fields, leading to interference between adjacent antennas and limiting their density, due to imperfections that are costly to mitigate with precise machining techniques.
Innovation Solution
A method involving pivoting the waveguide about its longitudinal axis to minimize the offset by determining and marking the optimal position for fitting to a reflector, using a device with transition guides and measurement tools to assess and reduce the transverse component of the electromagnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If precise machining techniques are used to limit waveguide imperfections, then the offset of the plane of propagation is reduced, but the manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by determining the optimal positioning of the waveguide relative to the reflector before final assembly. The method involves pivoting the waveguide about its longitudinal axis to find a position where the offset is minimized, then marking this position for assembly. This preliminary positioning step allows the use of waveguides with imperfections while still achieving acceptable performance, thereby reducing manufacturing costs.
2Ease of manufacture
If waveguides with imperfections are used to reduce manufacturing cost, then the manufacturing cost decreases, but the offset of the plane of propagation increases
Solution Approach 1:
The patent applies parameter changes by modifying the angular position of the waveguide relative to the reflector. By pivoting the waveguide about its longitudinal axis and selecting an optimal angular position, the method compensates for waveguide imperfections and minimizes the offset of the plane of propagation. This allows the use of waveguides with imperfections while maintaining acceptable performance.
3Ease of manufacture
If the offset of the plane of propagation is not limited, then the manufacturing cost is reduced, but the interference between adjacent antennas increases
Solution Approach 1:
The patent applies feedback by measuring the offset of the plane of propagation at different waveguide positions and using this measurement information to determine the optimal position. The method involves pivoting the waveguide, measuring the offset, and selecting the position where the offset is minimized. This feedback-driven approach ensures that the final assembly has acceptable performance while allowing the use of waveguides with imperfections.
Data Source
AI summary
The present invention relates to a method of assembling a radiocommunication antenna comprising a reflector connected to a subreflector via a circular section waveguide extending along a longitudinal axis. According to the invention, such a method comprises the following steps:the step of pivoting the waveguide about its longitudinal axis to determine a position such that an offset of the plane of propagation of a polarized electromagnetic field transmitted by this guide is limited,the step of marking this position on the waveguide, andthe step of fitting the waveguide to the reflector as a function of this mark.